43 survivors were rescued including 33 Germans being 9 Officers. 10 neutrals were sent home on 10th September. German crewmembers were sent to captivity at Falklands Is, however on late December they were transferred to a prison camp at South Africa along with 107 other prisoners from sunken ship Ussukuma scuttled off the mouth of River Plate Argentina on 5th December 1939.
Above, the list of German crewmembers captured by HMS Ajax.
Above, letter from "Falkland Islands Defence Regulation Order for Detention and Control of Enemy Subjects issued by the Island's Governor regarding the transfer of 140 Germans from Carl Fritzen and Ussukuma to Bavianspoort Camp near Simonstown.
HMS Achilles was one of the most active ships of the Royal Navy in south Atlantic having a decisive role in the battle of the River Plate.
Photo https://en.wikipedia.org/wiki/HMNZS_Achilles_(70)#/media/File:HMNZS_Achilles_SLV_AllanGreen.jpg